/Engine/Plugins/Runtime/SoundFields/Source/SoundFields/Public/SoundFields.h
virtual [TUniquePtr](API\Runtime\Core\Templates\TUniquePtr)< [ISoundfieldMixerStream](API\Runtime\AudioExtensions\ISoundfieldMixerStream) > CreateMixerStream ( const [ISoundfieldEncodingSettingsProxy](API\Runtime\AudioExtensions\ISoundfieldEncodingSettingsProxy) & InitialSettings )